* provided "as is" without express or implied warranty. *
**************************************************************************/
-/* $Id$ */
+/* $Id: AliESDpid.cxx 64123 2013-09-05 15:09:53Z morsch $ */
//-----------------------------------------------------------------
// Implementation of the combined PID class
#include "TArrayI.h"
#include "TArrayF.h"
+#include "TRandom.h"
#include "AliLog.h"
#include "AliPID.h"
#include "AliTOFHeader.h"
#include "AliESDpid.h"
#include "AliESDEvent.h"
#include "AliESDtrack.h"
+#include "AliMCEvent.h"
+#include "AliTOFPIDParams.h"
+
+#include <AliDetectorPID.h>
ClassImp(AliESDpid)
-Int_t AliESDpid::MakePID(AliESDEvent *event, Bool_t TPConly, Float_t timeZeroTOF) const {
+Int_t AliESDpid::MakePID(AliESDEvent *event, Bool_t TPConly, Float_t /*timeZeroTOF*/) const {
//
// Calculate probabilities for all detectors, except if TPConly==kTRUE
// and combine PID
MakeTPCPID(track);
if (!TPConly) {
MakeITSPID(track);
- MakeTOFPID(track, timeZeroTOF);
+ //MakeTOFPID(track, timeZeroTOF);
//MakeHMPIDPID(track);
//MakeTRDPID(track);
}
return 0;
}
//_________________________________________________________________________
+Float_t AliESDpid::GetTPCsignalTunedOnData(const AliVTrack *t) const {
+ AliESDtrack *track = (AliESDtrack *) t;
+ Float_t dedx = track->GetTPCsignalTunedOnData();
+
+ if(dedx > 0) return dedx;
+
+ dedx = t->GetTPCsignal();
+ track->SetTPCsignalTunedOnData(dedx);
+ if(dedx < 20) return dedx;
+
+ AliPID::EParticleType type = AliPID::kPion;
+
+ AliMCEventHandler* eventHandler=dynamic_cast<AliMCEventHandler*>(fEventHandler);
+ if (eventHandler) {
+ AliMCEvent* mcEvent = eventHandler->MCEvent();
+ if(mcEvent){
+ Bool_t kGood = kTRUE;
+ AliMCParticle *MCpart = (AliMCParticle *) mcEvent->GetTrack(TMath::Abs(t->GetLabel()));
+ TParticle *part = MCpart->Particle();
+
+ Int_t iS = TMath::Abs(part->GetPdgCode());
+
+ if(iS==AliPID::ParticleCode(AliPID::kElectron)){
+ type = AliPID::kElectron;
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kMuon)){
+ type = AliPID::kMuon;
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kPion)){
+ type = AliPID::kPion;
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kKaon)){
+ type = AliPID::kKaon;
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kProton)){
+ type = AliPID::kProton;
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kDeuteron)){ // d
+ type = AliPID::kDeuteron;
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kTriton)){ // t
+ type = AliPID::kTriton;
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kHe3)){ // 3He
+ type = AliPID::kHe3;
+ }
+ else if(iS==AliPID::ParticleCode(AliPID::kAlpha)){ // 4He
+ type = AliPID::kAlpha;
+ }
+ else
+ kGood = kFALSE;
+
+ if(kGood){
+ //TODO maybe introduce different dEdxSources?
+ Double_t bethe = fTPCResponse.GetExpectedSignal(track, type, AliTPCPIDResponse::kdEdxDefault, this->UseTPCEtaCorrection(),
+ this->UseTPCMultiplicityCorrection());
+ Double_t sigma = fTPCResponse.GetExpectedSigma(track, type, AliTPCPIDResponse::kdEdxDefault, this->UseTPCEtaCorrection(),
+ this->UseTPCMultiplicityCorrection());
+ dedx = gRandom->Gaus(bethe,sigma);
+// if(iS == AliPID::ParticleCode(AliPID::kHe3) || iS == AliPID::ParticleCode(AliPID::kAlpha)) dedx *= 5;
+ }
+ }
+ }
+
+ track->SetTPCsignalTunedOnData(dedx);
+ return dedx;
+}
+//_________________________________________________________________________
+Float_t AliESDpid::GetTOFsignalTunedOnData(const AliVTrack *t) const {
+ AliESDtrack *track = (AliESDtrack *) t;
+ Double_t tofSignal = track->GetTOFsignalTunedOnData();
+
+ if(tofSignal < 99999) return (Float_t)tofSignal; // it has been already set
+ // read additional mismatch fraction
+ Float_t addmism = GetTOFPIDParams()->GetTOFadditionalMismForMC();
+ if(addmism > 1.){
+ Float_t centr = GetCurrentCentrality();
+ if(centr > 50) addmism *= 0.1667;
+ else if(centr > 20) addmism *= 0.33;
+ }
+
+ tofSignal = t->GetTOFsignal() + fTOFResponse.GetTailRandomValue(t->Pt(),t->Eta(),t->GetTOFsignal(),addmism);
+ track->SetTOFsignalTunedOnData(tofSignal);
+ return (Float_t)tofSignal;
+}
+//_________________________________________________________________________
void AliESDpid::MakeTPCPID(AliESDtrack *track) const
{
//
return;
}
- Double_t p[10];
+ Double_t p[AliPID::kSPECIES];
Bool_t mismatch=kTRUE, heavy=kTRUE;
for (Int_t j=0; j<AliPID::kSPECIES; j++) {
Int_t ibin = fTOFResponse.GetMomBin(track->GetP());
Float_t timezero = fTOFResponse.GetT0bin(ibin);
- Double_t time[AliPID::kSPECIESN];
+ Double_t time[AliPID::kSPECIESC];
track->GetIntegratedTimes(time);
Double_t sigma[AliPID::kSPECIES];
Double_t tof = track->GetTOFsignal() - timezero;
Double_t p[AliPID::kSPECIES];
- Bool_t mismatch = kTRUE, heavy = kTRUE;
+// Bool_t mismatch = kTRUE;
+ Bool_t heavy = kTRUE;
for (Int_t j=0; j<AliPID::kSPECIES; j++) {
Double_t sig = sigma[j];
if (TMath::Abs(tof-time[j]) > (fRange+2)*sig) {
p[j] = TMath::Exp(-0.5*(tof-time[j])*(tof-time[j])/(sig*sig))/sig;
// Check the mismatching
- Double_t mass = AliPID::ParticleMass(j);
- Double_t pm = fTOFResponse.GetMismatchProbability(track->GetP(),mass);
- if (p[j]>pm) mismatch = kFALSE;
+
+// Double_t mass = AliPID::ParticleMass(j);
+// Double_t pm = fTOFResponse.GetMismatchProbability(track->GetP(),mass);
+// if (p[j]>pm) mismatch = kFALSE;
// Check for particles heavier than (AliPID::kSPECIES - 1)
if (tof < (time[j] + fRange*sig)) heavy=kFALSE;
}
- if (mismatch)
+ /*
+ if (mismatch)
for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]=1./AliPID::kSPECIES;
+ */
track->SetTOFpid(p);
- if (heavy) track->ResetStatus(AliESDtrack::kTOFpid);
- if (!CheckTOFMatching(track)) track->SetStatus(AliESDtrack::kTOFmismatch);
+ if (heavy) track->ResetStatus(AliESDtrack::kTOFpid);
+ // kTOFmismatch flas is not set because deprecated from 18/02/2013
+ // if (!CheckTOFMatching(track)) track->SetStatus(AliESDtrack::kTOFmismatch);
+ // else track->ResetStatus(AliESDtrack::kTOFmismatch);
}
//_________________________________________________________________________
void AliESDpid::MakeTRDPID(AliESDtrack *track) const
// Method to recalculate the TRD PID probabilities
//
Double_t prob[AliPID::kSPECIES];
- ComputeTRDProbability(track, AliPID::kSPECIES, prob);
+ GetComputeTRDProbability(track, AliPID::kSPECIES, prob);
track->SetTRDpid(prob);
}
//_________________________________________________________________________
// Combine the information of various detectors
// to determine the Particle Identification
//
- Int_t ns=AliPID::kSPECIES;
- Double_t p[10]={1.,1.,1.,1.,1.,1.,1.,1.,1.,1.};
+ Double_t p[AliPID::kSPECIES]={1.};
if (track->IsOn(AliESDtrack::kITSpid)) {
- Double_t d[10];
+ Double_t d[AliPID::kSPECIES];
track->GetITSpid(d);
- for (Int_t j=0; j<ns; j++) p[j]*=d[j];
+ for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]*=d[j];
}
if (track->IsOn(AliESDtrack::kTPCpid)) {
- Double_t d[10];
+ Double_t d[AliPID::kSPECIES];
track->GetTPCpid(d);
- for (Int_t j=0; j<ns; j++) p[j]*=d[j];
+ for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]*=d[j];
}
if (track->IsOn(AliESDtrack::kTRDpid)) {
- Double_t d[10];
+ Double_t d[AliPID::kSPECIES];
track->GetTRDpid(d);
- for (Int_t j=0; j<ns; j++) p[j]*=d[j];
+ for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]*=d[j];
}
if (track->IsOn(AliESDtrack::kTOFpid)) {
- Double_t d[10];
+ Double_t d[AliPID::kSPECIES];
track->GetTOFpid(d);
- for (Int_t j=0; j<ns; j++) p[j]*=d[j];
+ for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]*=d[j];
}
if (track->IsOn(AliESDtrack::kHMPIDpid)) {
- Double_t d[10];
+ Double_t d[AliPID::kSPECIES];
track->GetHMPIDpid(d);
- for (Int_t j=0; j<ns; j++) p[j]*=d[j];
+ for (Int_t j=0; j<AliPID::kSPECIES; j++) p[j]*=d[j];
}
track->SetESDpid(p);
//
Bool_t status = kFALSE;
- Double_t exptimes[5];
+ Double_t exptimes[AliPID::kSPECIESC];
track->GetIntegratedTimes(exptimes);
Float_t p = track->P();
track->GetInnerPxPyPz(ptpc);
Float_t momtpc=TMath::Sqrt(ptpc[0]*ptpc[0] + ptpc[1]*ptpc[1] + ptpc[2]*ptpc[2]);
- for(Int_t i=0;i < 5;i++){
+ for(Int_t i=0;i < AliPID::kSPECIES;i++){
AliPID::EParticleType type=AliPID::EParticleType(i);
Float_t resolutionTOF = fTOFResponse.GetExpectedSigma(p, exptimes[i], AliPID::ParticleMass(i));
return status;
}
+
//_________________________________________________________________________
-void AliESDpid::SetTOFResponse(AliVEvent *vevent,EStartTimeType_t option){
+Float_t AliESDpid::GetSignalDeltaTOFold(const AliVParticle *track, AliPID::EParticleType type, Bool_t ratio/*=kFALSE*/) const
+{
//
- // Set TOF response function
- // Input option for event_time used
+ // TOF signal - expected
//
-
- AliESDEvent *event=(AliESDEvent*)vevent;
+ AliVTrack *vtrack=(AliVTrack*)track;
- Float_t t0spread = 0.; //event->GetEventTimeSpread();
- if(t0spread < 10) t0spread = 80;
-
- // T0 from TOF algorithm
-
- Bool_t flagT0TOF=kFALSE;
- Bool_t flagT0T0=kFALSE;
- Float_t *startTime = new Float_t[fTOFResponse.GetNmomBins()];
- Float_t *startTimeRes = new Float_t[fTOFResponse.GetNmomBins()];
- Int_t *startTimeMask = new Int_t[fTOFResponse.GetNmomBins()];
-
- // T0-TOF arrays
- Float_t *estimatedT0event = new Float_t[fTOFResponse.GetNmomBins()];
- Float_t *estimatedT0resolution = new Float_t[fTOFResponse.GetNmomBins()];
- for(Int_t i=0;i<fTOFResponse.GetNmomBins();i++){
- estimatedT0event[i]=0.0;
- estimatedT0resolution[i]=0.0;
- startTimeMask[i] = 0;
- }
-
- Float_t resT0A=75,resT0C=65,resT0AC=55;
- if(event->GetT0TOF()){ // check if T0 detector information is available
- flagT0T0=kTRUE;
- }
-
+ const Double_t expTime = fTOFResponse.GetExpectedSignal(vtrack,type);
+ Double_t tofTime = 99999;
+ if (fTuneMConData && ((fTuneMConDataMask & kDetTOF) == kDetTOF) ) tofTime = (Double_t)this->GetTOFsignalTunedOnData((AliVTrack*)vtrack);
+ else tofTime=vtrack->GetTOFsignal();
+ tofTime = tofTime - fTOFResponse.GetStartTime(vtrack->P());
+ Double_t delta=-9999.;
+
+ if (!ratio) delta=tofTime-expTime;
+ else if (expTime>1.e-20) delta=tofTime/expTime;
+
+ return delta;
+}
- AliTOFHeader *tofHeader =(AliTOFHeader*)event->GetTOFHeader();
+//_________________________________________________________________________
+Float_t AliESDpid::GetNumberOfSigmasTOFold(const AliVParticle *track, AliPID::EParticleType type) const
+{
+ //
+ // Number of sigma implementation for the TOF
+ //
- if(tofHeader){ // read global info and T0-TOF info from ESD
- fTOFResponse.SetTimeResolution(tofHeader->GetTOFResolution());
- t0spread = tofHeader->GetT0spread(); // read t0 sprad
- if(t0spread < 10) t0spread = 80;
+ AliVTrack *vtrack=(AliVTrack*)track;
+ Double_t tofTime = 99999;
+ if (fTuneMConData && ((fTuneMConDataMask & kDetTOF) == kDetTOF) ) tofTime = (Double_t)this->GetTOFsignalTunedOnData((AliVTrack*)vtrack);
+ else tofTime=vtrack->GetTOFsignal();
+
+ Double_t expTime = fTOFResponse.GetExpectedSignal(vtrack,type);
+ return (tofTime - fTOFResponse.GetStartTime(vtrack->P()) - expTime)/fTOFResponse.GetExpectedSigma(vtrack->P(),expTime,AliPID::ParticleMassZ(type));
+}
- flagT0TOF=kTRUE;
- for(Int_t i=0;i<fTOFResponse.GetNmomBins();i++){ // read T0-TOF default value
- startTime[i]=tofHeader->GetDefaultEventTimeVal();
- startTimeRes[i]=tofHeader->GetDefaultEventTimeRes();
- if(startTimeRes[i] < 1.e-5) startTimeRes[i] = t0spread;
- }
+//_________________________________________________________________________
+void AliESDpid::SetPIDForTracking(AliESDtrack *esdtr) const
+{
+ // assign mass for tracking
+ //
- TArrayI *ibin=tofHeader->GetNvalues();
- TArrayF *t0Bin=tofHeader->GetEventTimeValues();
- TArrayF *t0ResBin=tofHeader->GetEventTimeRes();
- for(Int_t j=0;j < tofHeader->GetNbins();j++){ // fill T0-TOF in p-bins
- Int_t icurrent = (Int_t)ibin->GetAt(j);
- startTime[icurrent]=t0Bin->GetAt(j);
- startTimeRes[icurrent]=t0ResBin->GetAt(j);
- if(startTimeRes[icurrent] < 1.e-5) startTimeRes[icurrent] = t0spread;
- }
- }
+ // in principle AliPIDCombined could be used to also set priors
+ //AliPIDCombined pidProb;
+ //pidProb.SetDetectorMask(kDetTPC); // use only TPC information, couls also be changed
+ //pidProb.SetSelectedSpecies(AliPID::kSPECIESC); // number of species to use
+ //pidProb.SetDefaultTPCPriors(); // load default priors
+
+ Double_t prob[AliPID::kSPECIESC]={0.};
+ EDetPidStatus pidStatus=ComputePIDProbability(kTPC, esdtr, AliPID::kSPECIESC, prob);
+ // check if a valid signal was found, otherwise return pion mass
+ if (pidStatus!=kDetPidOk) {
+ esdtr->SetPIDForTracking(AliPID::kPion);
+ return;
+ }
- // for cut of 3 sigma on t0 spread
- Float_t t0cut = 3 * t0spread;
- if(t0cut < 500) t0cut = 500;
+ // or with AliPIDCombined
+ // pidProb.ComputeProbabilities(esdtr, this, p);
- if(option == kFILL_T0){ // T0-FILL is used
- for(Int_t i=0;i<fTOFResponse.GetNmomBins();i++){
- estimatedT0event[i]=0.0;
- estimatedT0resolution[i]=t0spread;
- }
- fTOFResponse.SetT0event(estimatedT0event);
- fTOFResponse.SetT0resolution(estimatedT0resolution);
- }
+ // find max probability
+ Float_t max=0.;
+ Int_t pid=-1;
+ for (Int_t i=0; i<AliPID::kSPECIESC; ++i) if (prob[i]>max) {pid=i; max=prob[i];}
- if(option == kTOF_T0){ // T0-TOF is used when available (T0-FILL otherwise) from ESD
- if(flagT0TOF){
- fTOFResponse.SetT0event(startTime);
- fTOFResponse.SetT0resolution(startTimeRes);
- for(Int_t i=0;i<fTOFResponse.GetNmomBins();i++){
- if(startTimeRes[i]<t0spread) startTimeMask[i]=1;
- fTOFResponse.SetT0binMask(i,startTimeMask[i]);
- }
- }
- else{
- for(Int_t i=0;i<fTOFResponse.GetNmomBins();i++){
- estimatedT0event[i]=0.0;
- estimatedT0resolution[i]=t0spread;
- fTOFResponse.SetT0binMask(i,startTimeMask[i]);
- }
- fTOFResponse.SetT0event(estimatedT0event);
- fTOFResponse.SetT0resolution(estimatedT0resolution);
- }
- }
- else if(option == kBest_T0){ // T0-T0 or T0-TOF are used when available (T0-FILL otherwise) from ESD
- Float_t t0AC=-10000;
- Float_t t0A=-10000;
- Float_t t0C=-10000;
- if(flagT0T0){
- t0AC= event->GetT0TOF()[0];
- t0A= event->GetT0TOF()[1];
- t0C= event->GetT0TOF()[2];
- }
+ //int pid = AliPID::kPion; // this should be substituted by real most probable TPC pid (e,mu -> pion) or poin if no PID possible
- Float_t t0t0Best = 0;
- Float_t t0t0BestRes = 9999;
- Int_t t0used=0;
- if(TMath::Abs(t0A) < t0cut && TMath::Abs(t0C) < t0cut && TMath::Abs(t0C-t0A) < 500){
- t0t0Best = t0AC;
- t0t0BestRes = resT0AC;
- t0used=6;
- }
- else if(TMath::Abs(t0C) < t0cut){
- t0t0Best = t0C;
- t0t0BestRes = resT0C;
- t0used=4;
- }
- else if(TMath::Abs(t0A) < t0cut){
- t0t0Best = t0A;
- t0t0BestRes = resT0A;
- t0used=2;
- }
+ //
+ if (pid>AliPID::kSPECIESC-1) pid = AliPID::kPion;
+ //
+ esdtr->SetPIDForTracking( pid );
+ //
+}
- if(flagT0TOF){ // if T0-TOF info is available
- for(Int_t i=0;i<fTOFResponse.GetNmomBins();i++){
- if(t0t0BestRes < 999){
- if(startTimeRes[i] < t0spread){
- Double_t wtot = 1./startTimeRes[i]/startTimeRes[i] + 1./t0t0BestRes/t0t0BestRes;
- Double_t t0best = startTime[i]/startTimeRes[i]/startTimeRes[i] + t0t0Best/t0t0BestRes/t0t0BestRes;
- estimatedT0event[i]=t0best / wtot;
- estimatedT0resolution[i]=1./TMath::Sqrt(wtot);
- startTimeMask[i] = t0used+1;
- }
- else {
- estimatedT0event[i]=t0t0Best;
- estimatedT0resolution[i]=t0t0BestRes;
- startTimeMask[i] = t0used;
- }
- }
- else{
- estimatedT0event[i]=startTime[i];
- estimatedT0resolution[i]=startTimeRes[i];
- if(startTimeRes[i]<t0spread) startTimeMask[i]=1;
- }
- fTOFResponse.SetT0binMask(i,startTimeMask[i]);
- }
- fTOFResponse.SetT0event(estimatedT0event);
- fTOFResponse.SetT0resolution(estimatedT0resolution);
- }
- else{ // if no T0-TOF info is available
- for(Int_t i=0;i<fTOFResponse.GetNmomBins();i++){
- fTOFResponse.SetT0binMask(i,t0used);
- if(t0t0BestRes < 999){
- estimatedT0event[i]=t0t0Best;
- estimatedT0resolution[i]=t0t0BestRes;
- }
- else{
- estimatedT0event[i]=0.0;
- estimatedT0resolution[i]=t0spread;
- }
- }
- fTOFResponse.SetT0event(estimatedT0event);
- fTOFResponse.SetT0resolution(estimatedT0resolution);
- }
- }
- else if(option == kT0_T0){ // T0-T0 is used when available (T0-FILL otherwise) from ESD
- Float_t t0AC=-10000;
- Float_t t0A=-10000;
- Float_t t0C=-10000;
- if(flagT0T0){
- t0AC= event->GetT0TOF()[0];
- t0A= event->GetT0TOF()[1];
- t0C= event->GetT0TOF()[2];
- }
+//_________________________________________________________________________
+void AliESDpid::MakePIDForTracking(AliESDEvent *event) const
+{
+ // assign masses using for tracking
+ Int_t nTrk=event->GetNumberOfTracks();
+ for (Int_t iTrk=nTrk; iTrk--;) {
+ AliESDtrack *track = event->GetTrack(iTrk);
+ SetPIDForTracking(track);
+ }
- if(TMath::Abs(t0A) < t0cut && TMath::Abs(t0C) < t0cut && TMath::Abs(t0C-t0A) < 500){
- for(Int_t i=0;i<fTOFResponse.GetNmomBins();i++){
- estimatedT0event[i]=t0AC;
- estimatedT0resolution[i]=resT0AC;
- fTOFResponse.SetT0binMask(i,6);
- }
- }
- else if(TMath::Abs(t0C) < t0cut){
- for(Int_t i=0;i<fTOFResponse.GetNmomBins();i++){
- estimatedT0event[i]=t0C;
- estimatedT0resolution[i]=resT0C;
- fTOFResponse.SetT0binMask(i,4);
- }
- }
- else if(TMath::Abs(t0A) < t0cut){
- for(Int_t i=0;i<fTOFResponse.GetNmomBins();i++){
- estimatedT0event[i]=t0A;
- estimatedT0resolution[i]=resT0A;
- fTOFResponse.SetT0binMask(i,2);
- }
- }
- else{
- for(Int_t i=0;i<fTOFResponse.GetNmomBins();i++){
- estimatedT0event[i]=0.0;
- estimatedT0resolution[i]=t0spread;
- fTOFResponse.SetT0binMask(i,0);
- }
- }
- fTOFResponse.SetT0event(estimatedT0event);
- fTOFResponse.SetT0resolution(estimatedT0resolution);
- }
- delete [] startTime;
- delete [] startTimeRes;
- delete [] startTimeMask;
- delete [] estimatedT0event;
- delete [] estimatedT0resolution;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff